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c43ed2e4 DS |
1 | /** |
2 | * bgp_bfd.c: BGP BFD handling routines | |
3 | * | |
4 | * @copyright Copyright (C) 2015 Cumulus Networks, Inc. | |
5 | * | |
6 | * This file is part of GNU Zebra. | |
7 | * | |
8 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2, or (at your option) any | |
11 | * later version. | |
12 | * | |
13 | * GNU Zebra is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
20 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
21 | * 02111-1307, USA. | |
22 | */ | |
23 | ||
24 | #include <zebra.h> | |
25 | ||
26 | #include "command.h" | |
27 | #include "linklist.h" | |
28 | #include "memory.h" | |
29 | #include "prefix.h" | |
30 | #include "thread.h" | |
31 | #include "buffer.h" | |
32 | #include "stream.h" | |
33 | #include "zclient.h" | |
34 | #include "vty.h" | |
7f342629 | 35 | #include "bfd.h" |
856ca177 | 36 | #include "lib/json.h" |
039f3a34 DS |
37 | #include "filter.h" |
38 | ||
c43ed2e4 | 39 | #include "bgpd/bgpd.h" |
7f342629 | 40 | #include "bgp_fsm.h" |
c43ed2e4 DS |
41 | #include "bgpd/bgp_bfd.h" |
42 | #include "bgpd/bgp_debug.h" | |
43 | #include "bgpd/bgp_vty.h" | |
44 | ||
45 | extern struct zclient *zclient; | |
46 | ||
c43ed2e4 DS |
47 | /* |
48 | * bgp_bfd_peer_group2peer_copy - Copy the BFD information from peer group template | |
49 | * to peer. | |
50 | */ | |
51 | void | |
52 | bgp_bfd_peer_group2peer_copy(struct peer *conf, struct peer *peer) | |
53 | { | |
7f342629 DS |
54 | struct bfd_info *bfd_info; |
55 | struct bfd_info *conf_bfd_info; | |
56 | ||
57 | if (!conf->bfd_info) | |
58 | return; | |
59 | ||
60 | conf_bfd_info = (struct bfd_info *)conf->bfd_info; | |
61 | if (!peer->bfd_info) | |
62 | peer->bfd_info = bfd_info_create(); | |
c43ed2e4 | 63 | |
7f342629 | 64 | bfd_info = (struct bfd_info *)peer->bfd_info; |
c43ed2e4 DS |
65 | |
66 | /* Copy BFD parameter values */ | |
67 | bfd_info->required_min_rx = conf_bfd_info->required_min_rx; | |
68 | bfd_info->desired_min_tx = conf_bfd_info->desired_min_tx; | |
69 | bfd_info->detect_mult = conf_bfd_info->detect_mult; | |
986aa00f | 70 | bfd_info->type = conf_bfd_info->type; |
c43ed2e4 DS |
71 | } |
72 | ||
73 | /* | |
74 | * bgp_bfd_is_peer_multihop - returns whether BFD peer is multi-hop or single hop. | |
75 | */ | |
8c4f6381 | 76 | int |
c43ed2e4 DS |
77 | bgp_bfd_is_peer_multihop(struct peer *peer) |
78 | { | |
986aa00f | 79 | struct bfd_info *bfd_info; |
80 | ||
81 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
82 | ||
83 | if (!bfd_info) | |
84 | return 0; | |
85 | ||
86 | if((bfd_info->type == BFD_TYPE_MULTIHOP) || | |
87 | ((peer->sort == BGP_PEER_IBGP) && !peer->shared_network) || | |
88 | is_ebgp_multihop_configured(peer)) | |
c43ed2e4 DS |
89 | return 1; |
90 | else | |
91 | return 0; | |
92 | } | |
93 | ||
94 | /* | |
7f342629 DS |
95 | * bgp_bfd_peer_sendmsg - Format and send a Peer register/Unregister |
96 | * command to Zebra to be forwarded to BFD | |
c43ed2e4 DS |
97 | */ |
98 | static void | |
7f342629 | 99 | bgp_bfd_peer_sendmsg (struct peer *peer, int command) |
c43ed2e4 | 100 | { |
7f342629 | 101 | struct bfd_info *bfd_info; |
d553294e | 102 | vrf_id_t vrf_id = VRF_DEFAULT; |
986aa00f | 103 | int multihop; |
7f342629 DS |
104 | |
105 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
106 | ||
d553294e | 107 | if (peer->bgp && (peer->bgp->inst_type == BGP_INSTANCE_TYPE_VRF)) |
108 | vrf_id = peer->bgp->vrf_id; | |
109 | ||
986aa00f | 110 | if (command == ZEBRA_BFD_DEST_DEREGISTER) |
111 | { | |
112 | multihop = CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP); | |
113 | UNSET_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP); | |
114 | } | |
115 | else | |
116 | { | |
117 | multihop = bgp_bfd_is_peer_multihop(peer); | |
118 | if ((command == ZEBRA_BFD_DEST_REGISTER) && multihop) | |
119 | SET_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP); | |
120 | } | |
121 | ||
7f342629 DS |
122 | if (peer->su.sa.sa_family == AF_INET) |
123 | bfd_peer_sendmsg (zclient, bfd_info, AF_INET, | |
124 | &peer->su.sin.sin_addr, | |
125 | (peer->su_local) ? &peer->su_local->sin.sin_addr : NULL, | |
126 | (peer->nexthop.ifp) ? peer->nexthop.ifp->name : NULL, | |
986aa00f | 127 | peer->ttl, multihop, command, 1, vrf_id); |
7f342629 DS |
128 | else if (peer->su.sa.sa_family == AF_INET6) |
129 | bfd_peer_sendmsg (zclient, bfd_info, AF_INET6, | |
130 | &peer->su.sin6.sin6_addr, | |
131 | (peer->su_local) ? &peer->su_local->sin6.sin6_addr : NULL, | |
132 | (peer->nexthop.ifp) ? peer->nexthop.ifp->name : NULL, | |
986aa00f | 133 | peer->ttl, multihop, command, 1, vrf_id); |
c43ed2e4 DS |
134 | } |
135 | ||
136 | /* | |
137 | * bgp_bfd_register_peer - register a peer with BFD through zebra | |
138 | * for monitoring the peer rechahability. | |
139 | */ | |
140 | void | |
141 | bgp_bfd_register_peer (struct peer *peer) | |
142 | { | |
7f342629 | 143 | struct bfd_info *bfd_info; |
c43ed2e4 | 144 | |
7f342629 DS |
145 | if (!peer->bfd_info) |
146 | return; | |
147 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
c43ed2e4 DS |
148 | |
149 | /* Check if BFD is enabled and peer has already been registered with BFD */ | |
7f342629 | 150 | if (CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_REG)) |
c43ed2e4 DS |
151 | return; |
152 | ||
7f342629 | 153 | bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_REGISTER); |
c43ed2e4 DS |
154 | } |
155 | ||
156 | /** | |
157 | * bgp_bfd_deregister_peer - deregister a peer with BFD through zebra | |
158 | * for stopping the monitoring of the peer | |
159 | * rechahability. | |
160 | */ | |
161 | void | |
162 | bgp_bfd_deregister_peer (struct peer *peer) | |
163 | { | |
7f342629 | 164 | struct bfd_info *bfd_info; |
c43ed2e4 | 165 | |
7f342629 DS |
166 | if (!peer->bfd_info) |
167 | return; | |
168 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
c43ed2e4 DS |
169 | |
170 | /* Check if BFD is eanbled and peer has not been registered */ | |
7f342629 | 171 | if (!CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_REG)) |
c43ed2e4 DS |
172 | return; |
173 | ||
7f342629 | 174 | bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_DEREGISTER); |
c43ed2e4 DS |
175 | } |
176 | ||
177 | /* | |
178 | * bgp_bfd_update_peer - update peer with BFD with new BFD paramters | |
179 | * through zebra. | |
180 | */ | |
7f342629 | 181 | static void |
c43ed2e4 DS |
182 | bgp_bfd_update_peer (struct peer *peer) |
183 | { | |
7f342629 | 184 | struct bfd_info *bfd_info; |
c43ed2e4 | 185 | |
7f342629 DS |
186 | if (!peer->bfd_info) |
187 | return; | |
188 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
c43ed2e4 DS |
189 | |
190 | /* Check if the peer has been registered with BFD*/ | |
7f342629 | 191 | if (!CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_REG)) |
c43ed2e4 DS |
192 | return; |
193 | ||
7f342629 | 194 | bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_UPDATE); |
c43ed2e4 DS |
195 | } |
196 | ||
986aa00f | 197 | /* |
198 | * bgp_bfd_update_type - update session type with BFD through zebra. | |
199 | */ | |
200 | static void | |
201 | bgp_bfd_update_type (struct peer *peer) | |
202 | { | |
203 | struct bfd_info *bfd_info; | |
204 | int multihop; | |
205 | ||
206 | if (!peer->bfd_info) | |
207 | return; | |
208 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
209 | ||
210 | /* Check if the peer has been registered with BFD*/ | |
211 | if (!CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_REG)) | |
212 | return; | |
213 | ||
214 | if (bfd_info->type == BFD_TYPE_NOT_CONFIGURED) | |
215 | { | |
216 | multihop = bgp_bfd_is_peer_multihop(peer); | |
217 | if ((multihop && !CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP)) || | |
218 | (!multihop && CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP))) | |
219 | { | |
220 | bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_DEREGISTER); | |
221 | bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_REGISTER); | |
222 | } | |
223 | } | |
224 | else | |
225 | { | |
226 | if ((bfd_info->type == BFD_TYPE_MULTIHOP && | |
227 | !CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP)) || | |
228 | (bfd_info->type == BFD_TYPE_SINGLEHOP && | |
229 | CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP))) | |
230 | { | |
231 | bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_DEREGISTER); | |
232 | bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_REGISTER); | |
233 | } | |
234 | } | |
235 | } | |
236 | ||
c43ed2e4 DS |
237 | /* |
238 | * bgp_bfd_dest_replay - Replay all the peers that have BFD enabled | |
239 | * to zebra | |
240 | */ | |
7f342629 | 241 | static int |
7076bb2f FL |
242 | bgp_bfd_dest_replay (int command, struct zclient *client, zebra_size_t length, |
243 | vrf_id_t vrf_id) | |
c43ed2e4 DS |
244 | { |
245 | struct listnode *mnode, *node, *nnode; | |
246 | struct bgp *bgp; | |
247 | struct peer *peer; | |
248 | ||
249 | if (BGP_DEBUG (zebra, ZEBRA)) | |
250 | zlog_debug("Zebra: BFD Dest replay request"); | |
251 | ||
055c4dfc | 252 | /* Send the client registration */ |
253 | bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER); | |
254 | ||
c43ed2e4 DS |
255 | /* Replay the peer, if BFD is enabled in BGP */ |
256 | ||
257 | for (ALL_LIST_ELEMENTS_RO (bm->bgp, mnode, bgp)) | |
258 | for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer)) | |
259 | { | |
c43ed2e4 DS |
260 | bgp_bfd_update_peer(peer); |
261 | } | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | /* | |
68fe91d6 | 267 | * bgp_bfd_peer_status_update - Update the BFD status if it has changed. Bring |
268 | * down the peer if the BFD session went down from * up. | |
269 | */ | |
270 | static void | |
271 | bgp_bfd_peer_status_update (struct peer *peer, int status) | |
272 | { | |
273 | struct bfd_info *bfd_info; | |
274 | int old_status; | |
275 | ||
276 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
277 | ||
278 | if (bfd_info->status == status) | |
279 | return; | |
280 | ||
281 | old_status = bfd_info->status; | |
282 | bfd_info->status = status; | |
283 | bfd_info->last_update = bgp_clock(); | |
284 | ||
285 | if ((status == BFD_STATUS_DOWN) && (old_status == BFD_STATUS_UP)) | |
286 | { | |
287 | peer->last_reset = PEER_DOWN_BFD_DOWN; | |
288 | BGP_EVENT_ADD (peer, BGP_Stop); | |
289 | } | |
290 | } | |
291 | ||
292 | /* | |
293 | * bgp_bfd_dest_update - Find the peer for which the BFD status | |
294 | * has changed and bring down the peer | |
295 | * connectivity if the BFD session went down. | |
c43ed2e4 | 296 | */ |
7f342629 | 297 | static int |
68fe91d6 | 298 | bgp_bfd_dest_update (int command, struct zclient *zclient, |
7076bb2f | 299 | zebra_size_t length, vrf_id_t vrf_id) |
c43ed2e4 DS |
300 | { |
301 | struct interface *ifp; | |
302 | struct prefix dp; | |
303 | struct prefix sp; | |
68fe91d6 | 304 | int status; |
c43ed2e4 | 305 | |
1e22a2af | 306 | ifp = bfd_get_peer_info (zclient->ibuf, &dp, &sp, &status, vrf_id); |
c43ed2e4 DS |
307 | |
308 | if (BGP_DEBUG (zebra, ZEBRA)) | |
309 | { | |
4690c7d7 | 310 | char buf[2][PREFIX2STR_BUFFER]; |
c43ed2e4 DS |
311 | prefix2str(&dp, buf[0], sizeof(buf[0])); |
312 | if (ifp) | |
313 | { | |
68fe91d6 | 314 | zlog_debug("Zebra: interface %s bfd destination %s %s", |
315 | ifp->name, buf[0], bfd_get_status_str(status)); | |
c43ed2e4 DS |
316 | } |
317 | else | |
318 | { | |
319 | prefix2str(&sp, buf[1], sizeof(buf[1])); | |
68fe91d6 | 320 | zlog_debug("Zebra: source %s bfd destination %s %s", |
321 | buf[1], buf[0], bfd_get_status_str(status)); | |
c43ed2e4 DS |
322 | } |
323 | } | |
324 | ||
325 | /* Bring the peer down if BFD is enabled in BGP */ | |
326 | { | |
327 | struct listnode *mnode, *node, *nnode; | |
328 | struct bgp *bgp; | |
329 | struct peer *peer; | |
330 | ||
331 | for (ALL_LIST_ELEMENTS_RO (bm->bgp, mnode, bgp)) | |
332 | for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer)) | |
333 | { | |
7f342629 | 334 | if (!peer->bfd_info) |
c43ed2e4 DS |
335 | continue; |
336 | ||
7bbc6864 DS |
337 | if ((dp.family == AF_INET) && (peer->su.sa.sa_family == AF_INET)) |
338 | { | |
339 | if (dp.u.prefix4.s_addr != peer->su.sin.sin_addr.s_addr) | |
340 | continue; | |
341 | } | |
c43ed2e4 | 342 | #ifdef HAVE_IPV6 |
7bbc6864 DS |
343 | else if ((dp.family == AF_INET6) && |
344 | (peer->su.sa.sa_family == AF_INET6)) | |
345 | { | |
346 | if (memcmp(&dp.u.prefix6, &peer->su.sin6.sin6_addr, | |
347 | sizeof (struct in6_addr))) | |
348 | continue; | |
349 | } | |
c43ed2e4 DS |
350 | #endif |
351 | else | |
352 | continue; | |
353 | ||
354 | if (ifp && (ifp == peer->nexthop.ifp)) | |
7bbc6864 | 355 | { |
68fe91d6 | 356 | bgp_bfd_peer_status_update(peer, status); |
7bbc6864 | 357 | } |
c43ed2e4 DS |
358 | else |
359 | { | |
360 | if (!peer->su_local) | |
361 | continue; | |
362 | ||
7bbc6864 DS |
363 | if ((sp.family == AF_INET) && |
364 | (peer->su_local->sa.sa_family == AF_INET)) | |
365 | { | |
366 | if (sp.u.prefix4.s_addr != peer->su_local->sin.sin_addr.s_addr) | |
367 | continue; | |
368 | } | |
c43ed2e4 | 369 | #ifdef HAVE_IPV6 |
7bbc6864 DS |
370 | else if ((sp.family == AF_INET6) && |
371 | (peer->su_local->sa.sa_family == AF_INET6)) | |
372 | { | |
373 | if (memcmp(&sp.u.prefix6, &peer->su_local->sin6.sin6_addr, | |
374 | sizeof (struct in6_addr))) | |
375 | continue; | |
376 | } | |
c43ed2e4 DS |
377 | #endif |
378 | else | |
379 | continue; | |
7bbc6864 | 380 | |
d553294e | 381 | if ((vrf_id != VRF_DEFAULT) && (peer->bgp->vrf_id != vrf_id)) |
382 | continue; | |
383 | ||
68fe91d6 | 384 | bgp_bfd_peer_status_update(peer, status); |
c43ed2e4 DS |
385 | } |
386 | } | |
387 | } | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | /* | |
393 | * bgp_bfd_peer_param_set - Set the configured BFD paramter values for peer. | |
394 | */ | |
7f342629 | 395 | static int |
c43ed2e4 | 396 | bgp_bfd_peer_param_set (struct peer *peer, u_int32_t min_rx, u_int32_t min_tx, |
7f342629 | 397 | u_int8_t detect_mult, int defaults) |
c43ed2e4 DS |
398 | { |
399 | struct peer_group *group; | |
400 | struct listnode *node, *nnode; | |
7f342629 | 401 | int command = 0; |
c43ed2e4 | 402 | |
68fe91d6 | 403 | bfd_set_param((struct bfd_info **)&(peer->bfd_info), min_rx, min_tx, |
404 | detect_mult, defaults, &command); | |
c43ed2e4 DS |
405 | |
406 | if (CHECK_FLAG (peer->sflags, PEER_STATUS_GROUP)) | |
407 | { | |
408 | group = peer->group; | |
409 | for (ALL_LIST_ELEMENTS (group->peer, node, nnode, peer)) | |
410 | { | |
7f342629 | 411 | command = 0; |
68fe91d6 | 412 | bfd_set_param((struct bfd_info **)&(peer->bfd_info), min_rx, min_tx, |
413 | detect_mult, defaults, &command); | |
c43ed2e4 | 414 | |
7f342629 DS |
415 | if ((peer->status == Established) && |
416 | (command == ZEBRA_BFD_DEST_REGISTER)) | |
c43ed2e4 | 417 | bgp_bfd_register_peer(peer); |
7f342629 | 418 | else if (command == ZEBRA_BFD_DEST_UPDATE) |
c43ed2e4 DS |
419 | bgp_bfd_update_peer(peer); |
420 | } | |
421 | } | |
7f342629 | 422 | else |
c43ed2e4 | 423 | { |
7f342629 DS |
424 | if ((peer->status == Established) && |
425 | (command == ZEBRA_BFD_DEST_REGISTER)) | |
c43ed2e4 | 426 | bgp_bfd_register_peer(peer); |
7f342629 | 427 | else if (command == ZEBRA_BFD_DEST_UPDATE) |
c43ed2e4 DS |
428 | bgp_bfd_update_peer(peer); |
429 | } | |
430 | return 0; | |
431 | } | |
432 | ||
433 | /* | |
986aa00f | 434 | * bgp_bfd_peer_param_unset - Delete the configured BFD paramter values for peer. |
c43ed2e4 | 435 | */ |
7f342629 | 436 | static int |
c43ed2e4 DS |
437 | bgp_bfd_peer_param_unset (struct peer *peer) |
438 | { | |
439 | struct peer_group *group; | |
440 | struct listnode *node, *nnode; | |
c43ed2e4 | 441 | |
7f342629 DS |
442 | if (!peer->bfd_info) |
443 | return 0; | |
c43ed2e4 DS |
444 | |
445 | if (CHECK_FLAG (peer->sflags, PEER_STATUS_GROUP)) | |
446 | { | |
7f342629 | 447 | bfd_info_free(&(peer->bfd_info)); |
c43ed2e4 DS |
448 | group = peer->group; |
449 | for (ALL_LIST_ELEMENTS (group->peer, node, nnode, peer)) | |
450 | { | |
c43ed2e4 | 451 | bgp_bfd_deregister_peer(peer); |
7f342629 | 452 | bfd_info_free(&(peer->bfd_info)); |
c43ed2e4 DS |
453 | } |
454 | } | |
455 | else | |
7f342629 DS |
456 | { |
457 | bgp_bfd_deregister_peer(peer); | |
458 | bfd_info_free(&(peer->bfd_info)); | |
459 | } | |
c43ed2e4 DS |
460 | return 0; |
461 | } | |
462 | ||
986aa00f | 463 | /* |
464 | * bgp_bfd_peer_param_type_set - set the BFD session type (multihop or singlehop) | |
465 | */ | |
466 | static int | |
467 | bgp_bfd_peer_param_type_set (struct peer *peer, enum bfd_sess_type type) | |
468 | { | |
469 | struct peer_group *group; | |
470 | struct listnode *node, *nnode; | |
471 | int command = 0; | |
472 | struct bfd_info *bfd_info; | |
473 | ||
474 | if (!peer->bfd_info) | |
475 | bfd_set_param((struct bfd_info **)&(peer->bfd_info), BFD_DEF_MIN_RX, | |
476 | BFD_DEF_MIN_TX, BFD_DEF_DETECT_MULT, 1, &command); | |
477 | ||
478 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
479 | bfd_info->type = type; | |
480 | ||
481 | if (CHECK_FLAG (peer->sflags, PEER_STATUS_GROUP)) | |
482 | { | |
483 | group = peer->group; | |
484 | for (ALL_LIST_ELEMENTS (group->peer, node, nnode, peer)) | |
485 | { | |
486 | command = 0; | |
487 | if (!peer->bfd_info) | |
488 | bfd_set_param((struct bfd_info **)&(peer->bfd_info), | |
489 | BFD_DEF_MIN_RX, BFD_DEF_MIN_TX, | |
490 | BFD_DEF_DETECT_MULT, 1, &command); | |
491 | ||
492 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
493 | bfd_info->type = type; | |
494 | ||
495 | if (peer->status == Established) | |
496 | { | |
497 | if (command == ZEBRA_BFD_DEST_REGISTER) | |
498 | bgp_bfd_register_peer(peer); | |
499 | else | |
500 | bgp_bfd_update_type(peer); | |
501 | } | |
502 | } | |
503 | } | |
504 | else | |
505 | { | |
506 | if (peer->status == Established) | |
507 | { | |
508 | if (command == ZEBRA_BFD_DEST_REGISTER) | |
509 | bgp_bfd_register_peer(peer); | |
510 | else | |
511 | bgp_bfd_update_type(peer); | |
512 | } | |
513 | } | |
514 | ||
515 | return 0; | |
516 | } | |
517 | ||
c43ed2e4 DS |
518 | /* |
519 | * bgp_bfd_peer_config_write - Write the peer BFD configuration. | |
520 | */ | |
521 | void | |
522 | bgp_bfd_peer_config_write(struct vty *vty, struct peer *peer, char *addr) | |
523 | { | |
7f342629 | 524 | struct bfd_info *bfd_info; |
c43ed2e4 | 525 | |
7f342629 DS |
526 | if (!peer->bfd_info) |
527 | return; | |
528 | ||
529 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
c43ed2e4 | 530 | |
7f342629 | 531 | if (CHECK_FLAG (bfd_info->flags, BFD_FLAG_PARAM_CFG)) |
c43ed2e4 DS |
532 | vty_out (vty, " neighbor %s bfd %d %d %d%s", addr, |
533 | bfd_info->detect_mult, bfd_info->required_min_rx, | |
534 | bfd_info->desired_min_tx, VTY_NEWLINE); | |
986aa00f | 535 | |
536 | if (bfd_info->type != BFD_TYPE_NOT_CONFIGURED) | |
537 | vty_out (vty, " neighbor %s bfd %s%s", addr, | |
538 | (bfd_info->type == BFD_TYPE_MULTIHOP) ? "multihop" : "singlehop", | |
539 | VTY_NEWLINE); | |
540 | ||
541 | if (!CHECK_FLAG (bfd_info->flags, BFD_FLAG_PARAM_CFG) && | |
542 | (bfd_info->type == BFD_TYPE_NOT_CONFIGURED)) | |
c43ed2e4 DS |
543 | vty_out (vty, " neighbor %s bfd%s", addr, VTY_NEWLINE); |
544 | } | |
545 | ||
546 | /* | |
547 | * bgp_bfd_show_info - Show the peer BFD information. | |
548 | */ | |
549 | void | |
856ca177 | 550 | bgp_bfd_show_info(struct vty *vty, struct peer *peer, u_char use_json, json_object *json_neigh) |
c43ed2e4 | 551 | { |
68fe91d6 | 552 | bfd_show_info(vty, (struct bfd_info *)peer->bfd_info, |
553 | bgp_bfd_is_peer_multihop(peer), 0, use_json, json_neigh); | |
c43ed2e4 DS |
554 | } |
555 | ||
556 | DEFUN (neighbor_bfd, | |
557 | neighbor_bfd_cmd, | |
558 | NEIGHBOR_CMD2 "bfd", | |
559 | NEIGHBOR_STR | |
560 | NEIGHBOR_ADDR_STR2 | |
561 | "Enables BFD support\n") | |
562 | { | |
563 | struct peer *peer; | |
564 | int ret; | |
c43ed2e4 DS |
565 | |
566 | peer = peer_and_group_lookup_vty (vty, argv[0]); | |
567 | if (! peer) | |
568 | return CMD_WARNING; | |
569 | ||
7f342629 DS |
570 | ret = bgp_bfd_peer_param_set (peer, BFD_DEF_MIN_RX, BFD_DEF_MIN_TX, |
571 | BFD_DEF_DETECT_MULT, 1); | |
c43ed2e4 DS |
572 | if (ret != 0) |
573 | return bgp_vty_return (vty, ret); | |
574 | ||
575 | return CMD_SUCCESS; | |
576 | ||
577 | } | |
578 | ||
579 | DEFUN (neighbor_bfd_param, | |
580 | neighbor_bfd_param_cmd, | |
7f342629 | 581 | NEIGHBOR_CMD2 "bfd " BFD_CMD_DETECT_MULT_RANGE BFD_CMD_MIN_RX_RANGE BFD_CMD_MIN_TX_RANGE, |
c43ed2e4 DS |
582 | NEIGHBOR_STR |
583 | NEIGHBOR_ADDR_STR2 | |
584 | "Enables BFD support\n" | |
585 | "Detect Multiplier\n" | |
586 | "Required min receive interval\n" | |
587 | "Desired min transmit interval\n") | |
588 | { | |
589 | struct peer *peer; | |
590 | u_int32_t rx_val; | |
591 | u_int32_t tx_val; | |
592 | u_int8_t dm_val; | |
593 | int ret; | |
c43ed2e4 DS |
594 | |
595 | peer = peer_and_group_lookup_vty (vty, argv[0]); | |
596 | if (!peer) | |
597 | return CMD_WARNING; | |
598 | ||
7f342629 DS |
599 | if ((ret = bfd_validate_param (vty, argv[1], argv[2], argv[3], &dm_val, |
600 | &rx_val, &tx_val)) != CMD_SUCCESS) | |
601 | return ret; | |
c43ed2e4 | 602 | |
7f342629 | 603 | ret = bgp_bfd_peer_param_set (peer, rx_val, tx_val, dm_val, 0); |
c43ed2e4 DS |
604 | if (ret != 0) |
605 | return bgp_vty_return (vty, ret); | |
606 | ||
607 | return CMD_SUCCESS; | |
608 | ||
609 | } | |
610 | ||
986aa00f | 611 | DEFUN_HIDDEN (neighbor_bfd_type, |
612 | neighbor_bfd_type_cmd, | |
613 | NEIGHBOR_CMD2 "bfd " BFD_CMD_TYPE, | |
614 | NEIGHBOR_STR | |
615 | NEIGHBOR_ADDR_STR2 | |
616 | "Enables BFD support\n" | |
617 | "Session type\n") | |
618 | { | |
619 | struct peer *peer; | |
620 | enum bfd_sess_type type; | |
621 | int ret; | |
622 | ||
623 | peer = peer_and_group_lookup_vty (vty, argv[0]); | |
624 | if (!peer) | |
625 | return CMD_WARNING; | |
626 | ||
627 | if (!strcmp(argv[1], "singlehop")) | |
628 | type = BFD_TYPE_SINGLEHOP; | |
629 | else if (!strcmp(argv[1], "multihop")) | |
630 | type = BFD_TYPE_MULTIHOP; | |
631 | else | |
632 | return CMD_WARNING; | |
633 | ||
634 | ret = bgp_bfd_peer_param_type_set (peer, type); | |
635 | if (ret != 0) | |
636 | return bgp_vty_return (vty, ret); | |
637 | ||
638 | return CMD_SUCCESS; | |
639 | } | |
640 | ||
c43ed2e4 DS |
641 | DEFUN (no_neighbor_bfd, |
642 | no_neighbor_bfd_cmd, | |
643 | NO_NEIGHBOR_CMD2 "bfd", | |
644 | NO_STR | |
645 | NEIGHBOR_STR | |
646 | NEIGHBOR_ADDR_STR2 | |
647 | "Disables BFD support\n") | |
648 | { | |
649 | struct peer *peer; | |
650 | int ret; | |
651 | ||
652 | peer = peer_and_group_lookup_vty (vty, argv[0]); | |
653 | if (! peer) | |
654 | return CMD_WARNING; | |
655 | ||
c43ed2e4 DS |
656 | ret = bgp_bfd_peer_param_unset(peer); |
657 | if (ret != 0) | |
658 | return bgp_vty_return (vty, ret); | |
659 | ||
c43ed2e4 DS |
660 | return CMD_SUCCESS; |
661 | } | |
662 | ||
813d4307 DW |
663 | ALIAS (no_neighbor_bfd, |
664 | no_neighbor_bfd_val_cmd, | |
665 | NO_NEIGHBOR_CMD2 "bfd " BFD_CMD_DETECT_MULT_RANGE BFD_CMD_MIN_RX_RANGE BFD_CMD_MIN_TX_RANGE, | |
666 | NO_STR | |
667 | NEIGHBOR_STR | |
668 | NEIGHBOR_ADDR_STR2 | |
669 | "Disables BFD support\n" | |
670 | "Detect Multiplier\n" | |
671 | "Required min receive interval\n" | |
672 | "Desired min transmit interval\n") | |
673 | ||
986aa00f | 674 | DEFUN_HIDDEN (no_neighbor_bfd_type, |
675 | no_neighbor_bfd_type_cmd, | |
676 | NO_NEIGHBOR_CMD2 "bfd " BFD_CMD_TYPE, | |
677 | NO_STR | |
678 | NEIGHBOR_STR | |
679 | NEIGHBOR_ADDR_STR2 | |
680 | "Disables BFD support\n" | |
681 | "Session type\n") | |
682 | { | |
683 | struct peer *peer; | |
684 | int ret; | |
685 | ||
686 | peer = peer_and_group_lookup_vty (vty, argv[0]); | |
687 | if (! peer) | |
688 | return CMD_WARNING; | |
689 | ||
690 | if (!peer->bfd_info) | |
691 | return 0; | |
692 | ||
693 | ret = bgp_bfd_peer_param_type_set(peer, BFD_TYPE_NOT_CONFIGURED); | |
694 | if (ret != 0) | |
695 | return bgp_vty_return (vty, ret); | |
696 | ||
697 | return CMD_SUCCESS; | |
698 | } | |
699 | ||
c43ed2e4 DS |
700 | void |
701 | bgp_bfd_init(void) | |
702 | { | |
567b877d | 703 | bfd_gbl_init(); |
704 | ||
c43ed2e4 | 705 | /* Initialize BFD client functions */ |
68fe91d6 | 706 | zclient->interface_bfd_dest_update = bgp_bfd_dest_update; |
c43ed2e4 DS |
707 | zclient->bfd_dest_replay = bgp_bfd_dest_replay; |
708 | ||
709 | /* "neighbor bfd" commands. */ | |
710 | install_element (BGP_NODE, &neighbor_bfd_cmd); | |
711 | install_element (BGP_NODE, &neighbor_bfd_param_cmd); | |
986aa00f | 712 | install_element (BGP_NODE, &neighbor_bfd_type_cmd); |
c43ed2e4 | 713 | install_element (BGP_NODE, &no_neighbor_bfd_cmd); |
813d4307 | 714 | install_element (BGP_NODE, &no_neighbor_bfd_val_cmd); |
986aa00f | 715 | install_element (BGP_NODE, &no_neighbor_bfd_type_cmd); |
c43ed2e4 | 716 | } |